Center paired app icons

In splitscreen overview, the pair of app icons is now always centered at
the top of the view, rather than following the divider's position.

Test: Visually tested on local P6 device

Fixes: 208648221

Change-Id: I460d06047693c9376dab8215085d54aa4164d69f
diff --git a/src/com/android/launcher3/touch/LandscapePagedViewHandler.java b/src/com/android/launcher3/touch/LandscapePagedViewHandler.java
index a94ad7c..a6c9c4d 100644
--- a/src/com/android/launcher3/touch/LandscapePagedViewHandler.java
+++ b/src/com/android/launcher3/touch/LandscapePagedViewHandler.java
@@ -482,17 +482,14 @@
                 (FrameLayout.LayoutParams) primaryIconView.getLayoutParams();
         FrameLayout.LayoutParams secondaryIconParams =
                 new FrameLayout.LayoutParams(primaryIconParams);
-        int dividerBar = (splitConfig.appsStackedVertically ?
-                splitConfig.visualDividerBounds.height() :
-                splitConfig.visualDividerBounds.width());
 
-        primaryIconParams.gravity = (isRtl ? START : END) | TOP;
-        primaryIconView.setTranslationY(primarySnapshotHeight - primaryIconView.getHeight() / 2f);
+        primaryIconParams.gravity = CENTER_VERTICAL | (isRtl ? START : END);
         primaryIconView.setTranslationX(0);
-
-        secondaryIconParams.gravity = (isRtl ? START : END) | TOP;
-        secondaryIconView.setTranslationY(primarySnapshotHeight + taskIconHeight + dividerBar);
+        primaryIconView.setTranslationY(-(taskIconHeight / 2f));
+        secondaryIconParams.gravity = CENTER_VERTICAL | (isRtl ? START : END);
         secondaryIconView.setTranslationX(0);
+        secondaryIconView.setTranslationY(taskIconHeight / 2f);
+
         primaryIconView.setLayoutParams(primaryIconParams);
         secondaryIconView.setLayoutParams(secondaryIconParams);
     }
diff --git a/src/com/android/launcher3/touch/PortraitPagedViewHandler.java b/src/com/android/launcher3/touch/PortraitPagedViewHandler.java
index ad9f95c..627aa11 100644
--- a/src/com/android/launcher3/touch/PortraitPagedViewHandler.java
+++ b/src/com/android/launcher3/touch/PortraitPagedViewHandler.java
@@ -581,26 +581,15 @@
                 (FrameLayout.LayoutParams) primaryIconView.getLayoutParams();
         FrameLayout.LayoutParams secondaryIconParams =
                 new FrameLayout.LayoutParams(primaryIconParams);
-        int dividerBar = (splitConfig.appsStackedVertically ?
-                splitConfig.visualDividerBounds.height() :
-                splitConfig.visualDividerBounds.width());
 
-        if (deviceProfile.isLandscape) {
-            primaryIconParams.gravity = TOP | START;
-            primaryIconView.setTranslationX(
-                    primarySnapshotWidth - primaryIconView.getMeasuredWidth());
-            primaryIconView.setTranslationY(0);
-            secondaryIconParams.gravity = TOP | START;
-            secondaryIconView.setTranslationX(primarySnapshotWidth + dividerBar);
-        } else {
-            primaryIconParams.gravity = TOP | CENTER_HORIZONTAL;
-            primaryIconView.setTranslationX(-(primaryIconView.getMeasuredWidth()) / 2f);
-            primaryIconView.setTranslationY(0);
-
-            secondaryIconParams.gravity = TOP | CENTER_HORIZONTAL;
-            secondaryIconView.setTranslationX(secondaryIconView.getMeasuredWidth() / 2f);
-        }
+        primaryIconParams.gravity = TOP | CENTER_HORIZONTAL;
+        // shifts icon half a width left (height is used conveniently here since icons are square)
+        primaryIconView.setTranslationX(-(taskIconHeight / 2f));
+        primaryIconView.setTranslationY(0);
+        secondaryIconParams.gravity = TOP | CENTER_HORIZONTAL;
+        secondaryIconView.setTranslationX(taskIconHeight / 2f);
         secondaryIconView.setTranslationY(0);
+
         primaryIconView.setLayoutParams(primaryIconParams);
         secondaryIconView.setLayoutParams(secondaryIconParams);
     }
diff --git a/src/com/android/launcher3/touch/SeascapePagedViewHandler.java b/src/com/android/launcher3/touch/SeascapePagedViewHandler.java
index de5f99c..80a7229 100644
--- a/src/com/android/launcher3/touch/SeascapePagedViewHandler.java
+++ b/src/com/android/launcher3/touch/SeascapePagedViewHandler.java
@@ -20,7 +20,6 @@
 import static android.view.Gravity.CENTER_VERTICAL;
 import static android.view.Gravity.END;
 import static android.view.Gravity.START;
-import static android.view.Gravity.TOP;
 
 import static com.android.launcher3.touch.SingleAxisSwipeDetector.HORIZONTAL;
 import static com.android.launcher3.util.SplitConfigurationOptions.STAGE_POSITION_BOTTOM_OR_RIGHT;
@@ -183,8 +182,8 @@
         FrameLayout.LayoutParams secondaryIconParams =
                 (FrameLayout.LayoutParams) secondaryIconView.getLayoutParams();
 
-        primaryIconParams.gravity = (isRtl ? END : START) | TOP;
-        secondaryIconParams.gravity = (isRtl ? END : START) | TOP;
+        primaryIconParams.gravity = CENTER_VERTICAL | (isRtl ? END : START);
+        secondaryIconParams.gravity = CENTER_VERTICAL | (isRtl ? END : START);
         primaryIconView.setLayoutParams(primaryIconParams);
         secondaryIconView.setLayoutParams(secondaryIconParams);
     }